Spectroscopic orbits for the dwarf novae X Leonis and SS Aurigae

Details Spectroscopic orbits for the dwarf novae X Leonis and SS Aurigae Spectroscopic orbits for the dwarf novae X Leonis and SS Aurigae

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..658s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Sept. 1986, p. 658-663.

Astronomy and Astrophysics

Astronomy

26

Dwarf Novae, Radial Velocity, Stellar Orbits, Stellar Spectrophotometry, Emission Spectra, H Alpha Line, Orbital Elements, Radiant Flux Density

Scientific paper

Radial-velocity studies for two dwarf novae, X Leo and SS Aur, are presented. The observations reveal the orbital period of X Leo to be 0.1644 + or - 0.0001 days and make it possible to refine Kraft and Luyten's (1965) original orbital-period estimate for SS Aur. In the case of SS Aur, the possibility of any cycle-count ambiguity is eliminated, and the orbital period is found to be 0.1828 + or - 0.0001 days. In addition to the period determinations, the radial-velocity amplitudes of the white dwarfs, as indicated from variations of the H-alpha emission lines, are found to be Kem = 105 + or - 10 km/s for X Leo and Kem = 70 + or - 10 km/s for SS Aur. The techniques employed in determining the orbital periods and in estimating the radial-velocity amplitudes are discussed.

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